A notch filter based on an index confined photonic band gap waveguide is proposed. The dropping of an electromagnetic wave having a specific wavelength is obtained by opportunely designing a periodically corrugated overlay. The selective filtering properties of the proposed structure are identified by using a computer code based on the bidirectional beam propagation method with the aid of the method of lines. The optimized design of a notch filter, characterized by a full-width half-maximum (FWHM) bandwidth of 2 nm, is given. The tunability is reached by exploiting the electroclinic effect of smectic-A* liquid crystals.
Tunability of photonic band gap notch filters / Calo', Giovanna; D'Orazio, Antonella; DE SARIO, Marco; Mescia, Luciano; Petruzzelli, Vincenzo; Prudenzano, Francesco. - In: IEEE TRANSACTIONS ON NANOTECHNOLOGY. - ISSN 1536-125X. - 7:3(2008), pp. 273-284. [10.1109/TNANO.2008.917848]
Tunability of photonic band gap notch filters
CALO', Giovanna;D'ORAZIO, Antonella;DE SARIO, Marco;MESCIA, Luciano;PETRUZZELLI, Vincenzo;PRUDENZANO, Francesco
2008-01-01
Abstract
A notch filter based on an index confined photonic band gap waveguide is proposed. The dropping of an electromagnetic wave having a specific wavelength is obtained by opportunely designing a periodically corrugated overlay. The selective filtering properties of the proposed structure are identified by using a computer code based on the bidirectional beam propagation method with the aid of the method of lines. The optimized design of a notch filter, characterized by a full-width half-maximum (FWHM) bandwidth of 2 nm, is given. The tunability is reached by exploiting the electroclinic effect of smectic-A* liquid crystals.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
